Accessory clamp



FIG. 1 is a perspective view of an accessory clamp showing my new design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines in the figures are included for the purpose of illustrating portions of an accessory clamp and form no part of the claimed design. 

CLAIM The ornamental design for an accessory clamp, as shown and described. 